Did I damage my parking pawl and transmission trying to stop a car roll?

So a few days ago when parking my R350 in the garage, I accidentally left the car in Neutral and turned off the engine. The car started to roll backwards slowly as my drive way is at a slight angle and I tried to use foot brake to stop the car. Seeing that the car is still moving, I then engaged the E-brake and it has only slowed down marginally. I was getting worried and decided to step on the brake and change to P. I heard clicking sound and finally the car came to a stop.

The speed was less than 5km/hour but I am worried my actions have damaged the parking pawl or transmission? I always use the Ebrake whenever I park my car so there is very minimal strain on the parking pawl during regular use.

You can't sorta hurt a parking pawl. It is either broken or not. Find a small hill and engage the parking pawl (put trans in park) and turn off the car. Does it move backwards? If not the parking pawl is fine.